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Old 04-01-2009, 01:31 AM   #1
linuzHX
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PuTTY cannot access remote zLinux


Hi all,

I use PuTTY to connect to a remote Suse Linux running under Z/VM in mainframe. Connection Type is SSH, and It failed with the message: (PuTTY Fatal Error) Network error: Network is unreachable.

However from another PC with the same PuTTY settings I am able to access.. These two PCs were within the same network and I have disabled the firewall..

Is there any option in Linux that restricts the number of romote log-on users? I cannot think of any other thing that might trigger this problem..

Thanks a lot!!
 
Old 04-01-2009, 02:58 AM   #2
maxy7710
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first try to ping the server & then try telnet, so that we can minimize the lookaround for us.

check the network connection on u r machine, from which u r using putty.
 
Old 04-01-2009, 03:11 AM   #3
linuzHX
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Quote:
Originally Posted by maxy7710 View Post
first try to ping the server & then try telnet, so that we can minimize the lookaround for us.

check the network connection on u r machine, from which u r using putty.
Thanks Maxy!

Ping works fine in both directions. But telnet cannot open connection to the host. It is the same case when I tried telnet from PuTTY.

Network connection has no problem.

big thanks!
 
Old 04-01-2009, 03:15 AM   #4
maxy7710
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try telnet

i.e

telnet serverip 22

so we will come to know tht port 22 is open between servers
 
Old 04-01-2009, 04:04 AM   #5
linuzHX
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Quote:
Originally Posted by maxy7710 View Post
try telnet

i.e

telnet serverip 22

so we will come to know tht port 22 is open between servers
Hi Maxy,

It shows: Could not open connection to the host, on port 22.

So the port is not open.. Do you have any idea what might cause this problem or how to proceed?

Thanks.
 
Old 04-01-2009, 04:53 AM   #6
maxy7710
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it means u r not able to access port 22 on server

1> restart the service sshd on the server.

2> see whether firewall & se linux are off.

3> if u have physical firewal in ur setup, see whether ports are open between u r pc & server.
 
  


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